Dynamic and fluid pressure brake intelock apparatus



Jan. 26,1954 E. G. ERSON EI'AL DYNAMIC AND FLUID PRESSURE BRAKE INTERLOCK APPARATUS Filed Oct. 28, 1950 2 Sheets-Sheet l mm mrmm m I v2 mam I.

W @W on MN Pm mm i om vm ON ATTORNEY Jan. 26, 1954 E. G. ERSON ETAL 2,667,385

DYNAMIC AND FLUID PRESSURE BRAKE INTERLOCK APPARATUS Filed Oct. 28, 1950 2 Sheets-Sheet 2 .Eigfi 148 .EL 4 I 446 1 145 147 Appficorion and l 170 QeIeose R Zone 162 l 166 169 158 3 g 165 167 1H1-ECP 151 171 11; 168

Iiig, lllr! g1 III "A Q6 118 INVENTORS' if? ErzK G. Erson 111 115 4 128116 BY Glenn MThomaS ATTORNEY Patented Jan. 26, 1954 DYNAMIQ'ANDIFLUID PRESSUREBRAKE INTER'LOGK APPARATUS" PennsvlVanial-- Application- Octob'eP28, 1950; Serial No.2192fl88i 16;Claims; 1-

This :inventiono'relates -tfll1ldJIJRBSSHISJ bYaKGS; and more particularly to thewtypei-fons-use on railway 1 locomotives;

Both steam and :singlexand multiple unit :diesel electric locomotives are ruse-d onrmodern railways and-in. many instances the r-drivingrmotorsaof .the cliesel'jgelectric:locomotives arearem ployed as. :gene erators :rtorprovide dynamics braking duringwdee scent :of 'a'-grade'-or a't other times wherrittis' desired .to brake the-locomotive and connectedcars: of atrainu. 'I'Hebrakes (in-freight cars are controlled on the automatic-=- prinoip1-through thermedium of -a brake pipes Incer-t'ain passenger service the brakes on the cars of- 'a train are-.also controlled only-on the automaticprim ciple through the medium of 'abrake pipe; but in other passenger service, i the ears are-also pro vided with electro-pneumatiostraightair apparatus-Whereby the -brakes may --'be selectivelycontroll'ed 0n the straight air-principle as well"- as on the automatic --prin-ciple.- Iii-alt types-"of service it is-desirable to beable to *releasethe brakes on the locomotive--independntlyof *the brakes -on-cars 0f---'a* trainandto" prevent; reap: pli'cation thereof withoutsome definite opera; tion on the part of the engineer: Moreover where dynamic brakes are employed it" desirable; ifazr' application; of: the fluid pressure brakes on the locomotive 'beoin' efIect,,th-at isuohi application be -automatically'releasedgwhen; the dynamic brakes g-are cut into .operationgor that an automatic or straight air application1of .loco-. motive brakes be prevented whil'e the-dynamic brakes are in operation; However; it desirable o be b to p ly nd releasethe ;fluid pressure brakes ,on the locomotive independenlililwf.ethebrakes on the cars of ajtrain atiany timel In order to provide a. brake ,equipmentawhich. would 4 meet all of the; above conditions. 1 for. v ypeset i ervicetheNo/MRL; locomotivebrake q ipment... isolosediin Westin hou e A r. Brake ,Co'mpanysilnstlzuctioni Pamphlet N 6.. 5066 dat dMarch l94&ivas;evo1red-.;.

The prin palsobiect on the inventionois the provision of .;certain improvements in. the ,2QRL. locomotive brake equipment which" improve: ments ,will hereinafter be particularlvpointed out:

Other objects and advantages of the invention will" become apparent fromthe follo-wing'more detailed descripti'onof th'e'inventionr In the =accom-panying-= drawings; 1 is a diagrai-nmatic 'view, 'partly-=in-"seetion and partly in outline of a portiomof a 24RL" locomotive brake equipment embodying cthednyenti'on; Fig.1

view-.1 0t 1; three 3 0311157 associated?withethe; .brak'e valverdevice; shownnin :Figg .2;- Fig s. x5 and. ,6 ,are diagrammatic ::views of;modificationaotiabrake. controllingwvalve;- device. shown? in Fig 1; I and Figuv'i' isa-diagrammaticwiew eta-{modified form of engineers independentbnake valvesdevicem DESCRIPTION The-finidmressurebrake equipmentembodivin the inventionmay bewgenerally like that,Ldis:-

closed; inn, the"; above. mentioned .s Instruction ators.to:provide:,drna-mic;brakin iandwhich-max haulitrainsionavhich the brakesare:adapted to becontrolled+eitherxautomaticallmthroughia-brake ipe :orzelectroepneumatioally through a- -straight air pipe, whichpipes aredesignated-fin?the-edrawrings by theyreferenoe numeralsizil sa-nda2; respect; tively.

An; 1 engineerls if, automatic: brake: valmer: dot-ice (not shown) at rthedeadingazendmf =;:th e zlQcomQ-o tive.-is :adaptedito.:;;eithen reduceot e1.

fluid. in the brake piped :and reehargeahezbrake pipe-:with 'fiuid under pressureiorto effect supply;

or :release 5 of fiuidfiunder'spressure i'tmorcfronnthe v straight air pipeZ.

Thepipes l iandx: 2 :botmare connectedi toe-a; pipe. bracket *3 of -"awbrake controlling cvalve :dee vice :4 one of whichz will: be provided onwas-"steam locomotive or: aesinglel'iunit ilocomotiveonreaol'fi unit- 0f a nrrultiple;"unit lo comotivev-a- Theo-brake controlling: valve de'vice comprises-ea service Supply-pipe 8; in a brake' cylinder "device' fl for" operating said-brake cylinder' devioe to efiotsam apressunewt;

automatic service application of brakes on the locomotive. The brake controlling valve device gency application of brakes the portions and of the brake controlling valve device are adapted to return to a release position for venting passage 6 to cause operation of the relay valve device I to release fluid under pressure from the brake cylinder device 9 to release the locomotive brakes.

Upon supply of fluid under pressure to the straight air pipe 2, such fluid will flow into a passage H in the pipe bracket 3 and thence, via a communication to be hereinafter described, to the relay valve device 1 for effecting operation thereof and thereby of the brake cylinder device 9 to apply the locomotive brakes. Upon release of fluidunder pressure from the straight air pipe 2 fluid under pressure will be released from the relay valve device I and brake cylinder device 9 to release the locomotive brakes.

According to the invention we provide an improved independent application and release valve device l2 adapted to be mounted directly on a mounting face l3 of the pipe bracket 3 when the equipment is to be used on a locomotive not capable of dynamic braking and which will be employed in freight service and in passenger service where no straight air pipe 2 is available for electro-pneumatic control of locomotive and car brakes. As shown in Fig. 1 the independent application and release valve device [2 however is carried by a filler piece 14 in turn mounted on the pipe bracket 3 over the mounting face l3, this combination constituting an equipment particularly adapted though not limited for use on locomotives adapted to control brakes on the locomotive and cars of a train either automatically through the brake pipe I or electro-pneumatically through the straight air pipe 2 and on which locomotive dynamic braking may or may not be employed and embodying various interlocks and arrangements for charging over the equipment to suit various conditions or types of service, as will be later explained, it being noted however that the filler piece I4 has through passages I5, IS, I1, [8 and i9 connecting passages in the mounting face on bracket 3 with aligned passages in the valve device l2 which would re ister if the filler piece l3 were not employed and said valvedevice 12 were mounted directly on the bracket 3, as for example, passage 6 in the bracket 3 is shown in the drawing connected through passage i5 in the flller piece l4 to an aligned passage 20 in the valve device l2, and passage 6 would register with passage 23 if the filler piece I4 were not employed. A cavity 2| in the bracket 3 is closed by the filler piece l4 but if said filler piece were not employed said cavity would establish communication between two passages 22 and 23 in the valve device [2. The straight air pipe passage II in the bracket would open to a passage 24 in the valve device l2 1f the filler piece 14 were removed, but when applied such communication is closed for reasons to be hereinafter described, It is to be noted that passage 16 in the filler piece l4 opens a passage 25 in the bracket to a passage 26 in the valve device 12, the passage 25 leading to the relay valve device 1, whereby supply of fluid under pressure to and its release from said relay valve device occurs via passage 23.

The independent application and release valve device i2 comprises a selector valve device 2?, a brake release valve device 28 and two double check valves Y29 and 30.

The selector valve device 21 comprises a piston 3! subject on one side to atmospheric pressure in a chamber 32 which is vented through a passage .33 and subject on the opposite side in a valve chamber 34 to fluid at the pressure in the main reservoir (not shown) on the locomotive which reservoir is connected to chamber 34 via a passage 35 in the interlock valve device, passage H in the filler piece I4 and a passage 36 in the pipe bracket 3. A slide valve 31 contained in chamber 34is connected bya stem 38 to piston St for movement therewith.

Below the piston 31 there is a coaxially ar ranged piston 39 of larger diameter subject on one side to atmospheric pressure in chamber 32 and open at the opposite side to a chamber 43 which is connected through a passage 4| in the independent application and release valve device l2, passage IS in the filler piece [4 and a passage 42 in the pipe bracket 3 to an actuating pipe 43. When the actuating pipe 43 and chamber 49 are substantially void of fluid under pressure, main reservoir pressure in Valve chamber 34 acting on piston 3| will move said piston and the slide valve 31 to a lower or normal position in which these parts are shown in the drawing and which is defined by engagement of said slide valve with a shoulder 44 in the casing. When fluid at sufficient pressure is present in the actuating pipe 43 and piston chamber 40 to provide a force on piston 39 which overcomes the force of main reservoir pressure in chamber 34 acting on piston 3|, the piston 39 will shift iston 31 and the slide valve 31 to a brake release position defined bycontact between piston 39 and a casing shoulder 45.

The brake release valve device 28 comprises a movable abutment preferably in the form of a flexible diaphragm 46 at one side of which is a pressure chamber 41 open through a passage 48 to the seat of the selector slide valve 31, while at the opposite side of said diaphragm is a control chamber 49 open through a passage 50 to the seat of the selector slide valve 31 and also to one end of passage l8 extendingv through the filler piece l4, the opposite end of passage It being open to a passage 5! in and extending through the pipe bracket 3 for connection with an application and release pipe 52. A valve 53 contained in chamber 41 controls communication between said chamber and atmosphere by way of passage 54, said valve being formed on one end of a stem 55 the opposite end of which is connected to a follower 56 pressed against the adjacent face of diaphragm 45 by a light spring 5'! whereby said valve will move with said diaphragm.

The double check valve 29 is arranged to control communication between passages 29 and 24 connected, respectively, to opposite ends of said double check valve, and passage 22 connected to a side outlet of said double check valve. When pressure of fluid in passage 20 exceeds that-in passage 24 the double check valve 29 will move to an upper position, in which it is shown in the cdrawing tolopeni passage. 29 .to .passagel't z and..close. passagei? ofifrom passage .24. When. pressure of..fluid .inpassage. 2 3. iexceeds thatin. passage .211 ;the :double check;.val-ve.29 twill; .ass. sume t a lower, .position. for opening .ipassagei a to. passage -22 and closing .oif. passage .2 2. v;f1ion 1. ,pas=. sage 28; In.like..manner the double ehecayalve 3i lcontrols communication betweenpassages. 5%; 23.'jconnecte.d,- respectively,. to. opposite..ends..-.of. said valveand .a passage .2 6. connected.tetheside. outlet. of said valve. The passagesfi 23 .and...2E- are .all connected-to. the. seat of. theselector. slide valve .31., the passage. 2B being also .connectedwia. passage 16 in .the.-filler .pie.ce...l i .togthe brake. cylinder relay. valve .clevice.-.'F andethe. passage. 23. lbeing. connected .to said filler .piece as before described.

The. filler piece has two .mounting .faces 5e .and The face .59 .is providing. for. mounting... a. dynamic brake interloclzmagnet....valve ,dev-ice. 6| .when the equipment is. applied ,to. a lldcomor. tive adapted to .employ .dynamiebralcing. The. mounting. face 69 is .provided...fo.r. mountinga combined dynamic brakeand .electro-pneumatic straight air interlock valve device ..32..When .the. equipment is applied to a locomotive adaptedto. either .provide dynamic braking. or. to ,control brakes on. the electro-pneumatic.straightair prin-. ciple.

The magnet valve device 5! comprises.aimag v net. 63 adaptecLto be energized whenvthelclya namic brakes on the-locomotiveare in; action. and to be .deenergized when said. dynamic brakes: are ineffective. The magnet valvedevicefil .fur: that. comprises two oppositelyseating abutting. valves 54 contained. in a chamber 5 and adapted: upon energization of magnet. tit-to ciosecommunicationbetween said chamber. and acham.-; ber ES-and to open .chambertfito atmosphere via .a chamber Gland anfatmosphericpassage 68. Upondeenergization of magnet spring. 659 visadapted to actuate the valves 8!; to a posi-. tion for opening chamber id-to chamber E55. and. for closing communication from chamber- 65.:to. chamber {51.

Valve chamber 55 is open via a-passage liLin: the filler piece to passage in the independent application and releasevalve device [if and alsovia a restricted. passage or choke II to apassage- E2 in the filler piece which latter passage is 0011- nested at one endto valve chamber fidrand rat.

the opposite end to passage 22 in said-valve-device I2.

The interlock valve device 52 comprises a.mov

able abutment preferably inithe form-eta flexible. N diaphragm 13 at opposite sides of VIhiChf are.

chambers is and 4-5, respectively; Chamber..'M-. is open to a timing volume 'ifipreferably cast in; the filler piece i -and- Which isopen; through. a. timing choke H and a parallel arrangedcommunication of greater flowwcapacity than: said choke and containing a check valve 33 :toa passage 79 in the filler piece. The passage 1- 9 15 open: to passage 8 l inthe. pipe bracket 3 3-l1d:h1'18&;t0 the straight air pipe 32.: The:checklpvalifeawiis arranged to prevent flow of fluidrundenzpressnmthrough the respective communicationzfromrpase sage it to the diaphragm chamber 1-H but. tozopenon reverse flow.

Thechamber below the diaphragm'.;l3...is open to a passage 35in the fi11l.pi-381. Whi'$h passage is connected to aapassage 8:- .in illlfizlllL-L dependent applieationtand .releasewalve device l 2 and also adapted to be opened: tic-passage: "t .tin'ii the filler piece through .arcommunicationssshowniniitheairawinaeassclosea:Joy a.splusetzf.. When:

the plug 82 is in.:-.the :position:.-m; .it.=is. shown inzthe-idrawing it. closes.v direct communication-betweenapassages. Waand fieoand .When. removedi-from thislocationrissadapted -;-to. be:.ap-' pliedtman opening. ;-83 at the-end. ofpassage. 83- where -:it' opens 1-430 ether; face against: which: the valve-device: 12 is; mounted. For-.thew. present .it. will belassumedlthat the .plug 82 in. the locationl.in-.iwhich--it is shown Pin: the. drawing. and theapurpose; of removal :from .-this. ..locat-ion. and applyingaitat --its.-other. location-.83; .will .be. hereinafter described. In actual practicenthe plug 82-.will.- be screw=threaded .into. the .posi-tion :for closingscommunication. between passages. 88 and I P and belaccessible for; application'- and .remov able. and. the 'opening flaswilll beascreimthreaded to.-;recei-vesaid ;plug,. it beingunderstood that the drawing {is merely diagrammatic andlillustrative.

Asdiaphragm followenfiiin chamber .l'Sisnrged.

against .the adj acent if ace :of diaphragm. .i 3 .witha chosen force. by- -a .spring .85 contained; in. saidchamber and .actingonlsaid.follower: A'stem secured..at. one end; toetheiollower- 8"! extends.

l through. chamber 15 and .slidably through: a Toasing wall 81. intov aechamber. t -swhich is. opendirectlyvtothe straight .air.v pipe. 2 through. the passages. 1Q sandal I. A valve wecontainedcin chamber. 88. z and connected. to- ,the end. of. stem.

86.,for movement therewith..-is arranged. to coop-v erate-with a seat'mprovidemonmne end .oI".-a ..mov-. able plunger. 90,. which. isjslidably mounted in. the casing, to controlcommunication.between. said chamber and .aachamber: 9 l..via...an. axiaLpassage szethroughz said plunger... The chamber .Eil. is.

open through a massage ..Eiain. the. .filler .piece l to -:passage 24-in..the independent. application and releasevalve. device: l2 .and contains .a .valve 9 formed .-on..theend..o.;pl1mger 9E1v andarranged tocooperatelwith. a seat inthe casing'tolcontrol communication: between-maid chamber. and an annular .cavity 1 @provided. .intheextei'ior surfaceiof said plungerpnder said yalveandlwhich. cavity is in. constant. communicationxwith. atmo a pherethrou-gh..passage.=..58. in. the filler; piece. I 4.

Allight seatingspring QSQJnphamberAl acts on.

the valve 94 for urging it to its seat.

Theeaetuatingpipe 423 .and application. and release .pipetlconnect .thepipe bracket 3-,to..an engineers:v independent brake .Vflllfie device all Asshownin Fig ,2-,=.the =preterred.formof brake valve device. 91. comprises. a casing. containing. a vertically; disposed..rotatab1e...shaft 93. extending throughmchamber 99 andinto .a:p1.eS5l1Te.Cha1m.-. Deal 01] and .journaled. adjacent one .endin abore through: a.- partition wall} I 0 l. separating. said chambers. From chamber 9fi-.;the.shaft. .98 .extends through aiournaling borein. acover. .l 532 .-to atpoint aboveitheecover. and on.this-.outer end of said shaft-thereissecnredhyapin. Hi3 an element lil hhavinggat.*eitherssidaofisaid shaft, anopening lfi5extending .radially.; of. the shaft and alignedwith.a.correspondingopenin ...I 96. extend.-. ing. diametrically.;,thmugh.saidshaft; In.,.these aligned iopenings there-sis disposed .a'zportionof. aniiopeisatorssicontrol =;.handle i M.- -Whifihifih one.

sideof-thehaf-tlis fulcrumed Omar-pi 35103511? riecl-:byetheeelementr. I fitvi-fomvertical movement in:zsaidropeningszrelatmefoo .thfe-rshaftfit: Upon horizontal.movementizofi'shandlec l N: Z-it-s connec tionsczwith-i thee-side: walls of; openings;- N15:- is. adaptedfito tunnzthe shaft 935;.

Theshandlezz l El'l iamiashafit' :98; have'eaarelease itheyaare-sshhwnginulfiiga2 land;-

lease zone of horizontal movement'from saidpo sition as also indicated in Fig. 4.

Slidably mounted in an axial bore I08 in shaft 98 is a plunger I09 one end of which engages the handle I01 while the opposite end is subject to the pressure of a spring I II! in said bore. The spring III] is effective to normally hold the handle in an elevated position, in which it is shown in the drawing, and will oppose manual depression or vertical movement of said handle downward. Whenever the handle I01 is relieved of manual pressure it will assume its elevated position under action of spring I I0.

Chamber I in the brake valve device is constantly open to the application and release pipe 52 and contains a cam I I I on shaft 90 for controlling operation of a self-lapping fluid pressure supply and release valve mechanism H2. The valve mechanism H2 comprises a plunger H3 slidably mounted in the casing at right angles to the axis of shaft 98 and having one and arranged for control by the peripheral cam face of cam II I. Fulcrumed intermediate its ends on plunger H3 is an equalizing lever IIfi one end of which is connected by a pin H5 to one end of a longitudinally movable shaft I IS the opposite end of which engages the seating face of a fluid pressure supply valve H1. The valve II1 is arranged to cooperate with a seat in the casing to control communication between chamber I00 and a chamber H0 which is open to a fluid pressure supply pipe II9. A spring I20 acts on the supply valve II1 for urging it to its seat;

The opposite end of the equalizing lever He carries a roller I2I engaging the end of a stem I22 upon which there is provided a fluid pressure release valve I23 arranged to cooperate with a seat on a movable piston I20 to control communication through said piston between the pressure chamber I00 at one side and a chamber I25 at the opposite side which latter chamber is open to atmosphere through a port I25. A pressure regulating spring I21 in chamber I25 acts on the piston I26 in opposition to pressure of fluid in chamber I00. A bias spring I28 carried by piston I20 acts on stem I22 to unseat the release valve I23.

With the brake valve handle I01, shaft 98 and cam III in their release position, in which they are shown in the drawing, the plunger I I3 is permitted to move in the direction of the left-hand an extent to permit seating of the supply valve I I1 by spring H8, to permit unseating of the release valve I23 by spring I28 and to also permit full extension of the pressure regulating spring I21 and thereby positioning of the piston I20 as shown in the drawing.

Upon movement of the handle 501 out of its release position into its application and release zone the cam I I I will be operated to displace the plunger H3 in the direction of the right-hand and during the initial portion of such displacement the spring I20 will hold the supply valve I I1 seated to cause such rocking of the lever I I0 as to seat the release valve I23. After the release valve I23 is seated the lever II4 will rock in the opposite direction and unseat the supply valve II1. Assuming that the supply valve chamber H3 is supplied with fluid under pressure from pipe I I9 fluid under pressure will then flow past th unseated supply valve to pressure chamber I00 and the application and release pipe 52 and in chamber I00 act on piston I24 and move same against spring I21 in accordance with the increase in pressure of fluid in said chamber. As-

suming the movement of handle I01 is stopped at any position in the application and release zone thereby fixing the position of cam III and displacement of plunger I I 3, fluid under pressure will continue to be supplied to chamber I00 and the application and release pipe 52 until the movement of piston I24, in accordance with the increase in pressure of fluid in chamber I 00, permits suflicient rocking of lever I I4 by the supply valve spring I20 to cause the supply valve II1 to move into contact with its seat for thereby cutting off further supply of fluid under pressure to said chamber and limiting the pressure therein in accordance with the extent of movement of its application and release zone from its release position.

On the other hand, if the handle is in the application and release zone and it is moved back toward release position to a new position in said zone, the force of cam I I I will be relieved on plunger H3 and with the supply valve H1 seated by spring I20, spring I20 will rock the lever I I0 and unseat the release valve I23 whereupon fluid under pressure will be released from chamber I00 and the application and release pipe 52. As the pressure of fluid is thus reduced in chamber I00 spring I21 will move piston I22 toward the release valve I23 the position of which will be fixed according to the position of handle I01. Fluid under pressure will thus continue to release from chamber I00 and pipe 52 and the piston I24 will continue its movement under action of spring I21 until said piston seats against the release valve I23 to prevent further release of such fluid under pressure, thereby limiting the reduction in such pressure in accordance with the position of handle I01 in its application and release zone. If the handle is returned to release position the spring I21 will become fully extended without moving the piston I24 into seating engagement with the release valve I23 whereby a complete release of fluid under pressure from chamber I00 and pipe 52 will occur.

It will now be seen that the valve mechanism II2 will provide fluid in chamber use and pipe 52 at a pressure corresponding to the position of handle I01 in the application and release zone away from its release position and will open said chamber and pipe to atmosphere in said release position.

The brake valve device 91 further comprises a valve I20 contained in a chamber I39. open through a passage I3I to the actuating pipe as. ifhe valve I29 is formed on one end of a plunger I32 which is slidably mounted in a bore in the casing and is arranged to control communication between chamber I30 and an annular cavity I33 provided around said plunger beneath the valve I29 and which cavity is adapted to be constantly supplied with fluid under pressure from the supply pipe II9. A spring I30 in chamber I30 acts on valve I20 for urging it to its seat.

A passageway I35 extends axially through the plunger I32 and valve I29 for opening chamber I30 to a chamber I30 at the opposite end of said :59 plunger which-flatter chambergis open {through apassagel31--to-' charhber'-99,- "chamber ea being constant communication with atmosphere through a passage 13 8. In chamber- 136 a seat is provided -on-plunger l32-{aroun'd the endof passageway-1135' foi:seating contacthy a valve I391v contained in -said -ehamber. The valve 533 has a stem M which'tor a portion of" its length 1 adjacent said r valve is fluted and in sliding: contact with 1 the wall iot passageway-l 35 while the ment with the valve t3fi,wplunger HEP-and valve 129. Asplungeri 43;:isislidably mounted in this here wvith one end disposeduinchamber 136 in contact -withvvalve" I39 :Whilei itsoppositeend is *disposed in chamber 99iin contact-:with' the end :of one =armofv a -.bell: crank-1ike"leverited.

Projecting from the leversa'i id intermediate its ends is a fulcrum arm $1145 .looselymounted at its end on; arpin." M6 one end .of; which .is. secured in the brake valve easing-"while a springiti interposed. betweenlsaiducasing and armi holds :said arm against: a; head-e148 .onathe opposite. end. of said pin.

The otherzend=of:lever2;i|44 engages theiunderside of a collar [49 providedzonza sleeve- 159 which .is slidably mounted'on theihandle operated shaft :38 within chambergkfiil. 1 Within thexsleevez i553 theishaft: as is provided with. two diametrically oppesitetslotsai ll:'(Fig ;.3),z;a nd@. a pin t52 carried by-iiplunger L99: extends'lithrough these: slots and r is. :conn'ectedgtof- 131163601131 M seat; opposite sides of said shaft. ith thisarrangement the spring 1: ix! 9': within: shaft: 93, ii -When it acts to ;move'. the handle :to itsnormal 2' elevated plane of move- :ment, I alsojshifts the-.-sleeveyl 58 and collar; M9: on svshafti-i-fis to -an i upper :position. which permits :gspring: 141;. acting through stem;:-i t0. on 1 the. :releaseaizalveriw; toaznoveisaidlvalve :to; its open ;-position:and to -actuatezaplunger A43 to holdthe wppositee end of levers] 44 in-.:-contactl vwrithpsaid 2 collar suiiden :vghiclr condition; the-valve; i 25; will bezseated by spring-.134. ":Thus a-withzthahand Malamute elevatedpositionl theiac-tuating pipeflii will be ventedl-pastnthe :open valve 139.- Upon depressiongof; handle; 31,; regardles of itshorizontal .l posit-1011;. l;th :l-.,dqwnvvard moveme of s-plungerfleaiwillaactuatecollar H w to,1-"ock* 17116213811; crank -lever 44 in -a; counterclockactua e tpluneere I 4. Q;-f --,-t v 1 e;wi a; onp-plunger i 3251211615 the 54 12 5 69, ai spluns to l unseat. =valve 29 to cooperate with" a seat! 55" to close 'communi- When; this occurs fluid" -unde1'-= pressure from the;:supp1y pipe gtfirqwill flow past I valve e 2 9 to the actuating; pipe 453 comprises a -check valve {159 V trolled by acam ,VI tll on F the shaft; 1.98 but spectively in .F ig. f2 ,put P .vslightlyinthat the handlellfil s ivotedm vertical .movement, against or,..]o' lthe gplunger; J09 about a. pin 63 gcarried by an onset; portion L64 of thefshaft1,62. l the lever t i i- -will actuatea plungerflfB'SQto "open the supply. valve iSG. corresponding functionally to. the supplyvalve E29) Jfor establishinglcoinmunication; between two chambers; 161.. 158 con- 40' pipe 5 i 9. and. passage 13 L leading tolthelactuating pipe 43 wherebywjsaidactuating' pipelwill be supplied with fluid under pressurej .Upon-released manual pressure on handle I 6 iandreturn there- 7 a ine-p pe.

:cation from chamber'l54:to: atmosphere-via bore containing a-1 1flute'd stem --i|:5fi and opening said chamberv to :chamber 9'9, -a: spring 1 I 5 I in -chani15er t' a actingson. saidxrcheck- -valve tor urgingitto its seat. The stem I56 at one end engages the check valve I53 andxitsiiopposite end is arranged t ion contact withthe peripheral ,surface of a, cam warr nted.

on o the sha' ft 33; Tlie-f earril fiB is so designed ,IF-jlg. 4) ..as,.to actuatejstemll, 6.11:0

spring ifel.

The. independent brake-valve. device, 91 further arranged to be c9 1- structure, is not per timant to the invention and willnot be further' described.

= If des re t -i deben entb ake v lvaqev c shown in, Fig.lZ a be .modifidas shownm Fig. 7 the only difference ,being that [the "func- 25l a i nt, rr n eme ts aseeareie are tions. of valves ,1, 29 .and li39 are, performed Lbya andiifm' respectively.

I (In the. brakevalve l device shownlin Fig.1 the handle t6 [and shaft .152 periorinthesame tions as the comesponding parts lfll-"andttl rediffer structurally Upbndepjression. .of handle. l

nected,=re spectively, tolthe. fluid-pressure Supply of to, itsnormal eleva ted position byv spring .110 (Fig. 2),,a..spring. .I6!-J Will close valve' lfiflto vcut off. supply of fiuidviunder -pressure to theactu- The plu ger.- IE5 extends \t rcueh bore inapartitionivall iii]rseparatingl chainloer ing sealing and .slidingoohtact withdtheivvalllof said. boreto preventlea l 1% from. chamberfifi, and onsaid. stern isasealing structure in the .form. of a Qpiston ll Lghavage of; fluid. under spires- 7 sure fromchambervlfifllpast. said stem.

;The chamber] $8 is openthrough. a passage: 1.12 to a'chamber l'i3 ab ovelthe spak valvehandle ifil. Chamber, H3 contains the release valve! I corresponding functionally to lthe release yalve l39-in Fig. 2 );arranged to, cooperate ,witha.- s,eat M5 to control communication hetween.chamber H37 and atmosphere. I spring lflt rin cha rnber {Yeasts-on valveffl Lto urge itto itsseat.

Thetv alve Ht is.larranged abcve, thef brake val -31 3 3 i l mwe i lfi i nmw i i vi brake valveshaft lfig; andrar'stem l7i; -depends item sa d; valva..a si haa t l we tendk g a ee ehe i f seneaei liihan azeneeei the plungertfie. :With the handle!Stin -itsafilea. vated position; said handle .adaptedg'tovzlact through stem; 11 1. tot open-valve i :i TQIfOIZJ/QGHTiJiH'g the, actuating pipe tt whilea uponidepressiorr nf saidhantlike to open-the supplyva1ve =ft6-as above described, spring i-le'is adapted to close the -reiease valvel M.

" It -wi11 therefore be'seen that the valves I66 11 and I14 as controlled by the brake valve handle IBI perform the same functions as valves I29, I39 as controlled by handle I01. Except a above pointed out the two brake valve devices may be 7 identical.

OPERATION A above mentioned, the brake equipment as illustrated in Figs. 1 and 2 of the drawing is for use on locomotives arranged for dynamic braking and particularly intended for controlling fluid. pressure brakes on the locomotive and cars of a train'either on the automatic or electropneumatic straight air principle and also provides for control of the brakes on the locomotive independently of those on cars of a train, and

the operation of such equipment is as follows.

Let it be assumed that the independent brake valve handle It! or IGI is in its release position opening both the actuating pipe 43 and the application and release pipe 52 to atmosphere. With the actuating pipe 43 thus vented chamber 40 below piston 39 in the selector valve device 21 will be vented so piston 3| and slide valve 31 will be in the lower or normal position. Let it further be assumed that the dynamic brakes on the locomotive are not in operation and as a result the magnet 63 of the dynamic brake interlock magnet valve device 62 is deenergized as a result of which the valves 64 will be in their upper position in which they are shown in the drawing.

Now assume that the engineer desires to apply the brakes on the locomotive and cars of a train on the automatic principle and reduces the pressure of fluid in brake pipe I to accomplish same. As a result, the service, or both the service interlock magnet valve device GI to passage '19,

thence to passage 23 in the valve device I2, past the lower end of the double check valve 30 to passage 28, and from passage 26 through passage I6 in the filler piece I d and passage in the pipe bracket 3 to the relay valve device I and operate said device and thereby the brake cylinder device 9 to apply the locomotive brakes. By reverse flow through the communication just traced fluid under pressure will be released from the relay valve device I to effect a release of locomotive brakes upon response of the brake controlling valve device 4 to recharging of the brake pipe I, in the usual manner.

If the engineer desires to apply the brakes on the electro-pneumatic straight air principle he will effect a supply of fluid under pressure to the straight air pipe 2 and thence through passage II in the bracket 3 to passage I9 in the;

flller piece I4. From passage I9 such fluid under pressure will flow past the open valve 89 in the interlock valve device 62 to chamber 9| and thence through passage 93 to passage 24 in the independent application and release valve device I2. From passage 24 the fluid under pressure will flow past the upper end of the double check valve 29 to passage 22 and to the relay valve device I for operating same to apply the locomotive brakes, through the same communi-.

cation above described in effecting an automatic application of locomotive brakes. By reverse flow through the communcation just described the straight air electro-pneumatic application of brakes will be released upon release of fluid under pressure from the straight air pipe 2.

When fluid under pressure is supplied to passage 19 in the flller piece III for effecting an electro-pneumatic application of locomotive brakes as just described, a portion of this fluid will flow through choke I1 into the timing volume I6 and diaphragm chamber I4 above diaphragm 13 in the interlock valve device 62, while a portion of the fluid supplied past the double check valve 29 to passage 22 and thence to passage 23 will flow through a cavity I19 in the selector slide valve 31 to passage BI and thence through passage 89 in the filler piece Id to chamber I5 below the diaphragm I3. The choke II so delays the build up of pressure in chambers I6 and I4 with respect to the build up in chamber I5 however that spring 85 is enabled to prevent deflection of diaphragm 13 from its normal position, whereby the valve 89 will remain open during an electro-pneumatic application of brakes. It also remains open in releasing an electro-pneumatic straight air application of brakes since upon release of fluid under pressure from passage I9 the pressure of fluid in the timing volume I6 and diaphragm chamber I4 will reduce past the check valve I8 with the reduction in pressure in passage I9 and thus ahead of the consequent reduction in pressure in diaphragm chamber I5.

When the locomotive brakes are released if the engineer desires to apply the locomotive brakes independently of those on the train, he will turn the independent brake valve handle Ill! or I6! into the application and release zone and thereby supply fluid to the application and release pipe 52 at a pressure corresponding to the desired degree of brake application. Such fluid will flow from pipe 52 through passage 5| in pipe bracket 4, passage I9 in flller piece I4 to passage 59 in the independent application and release valve device I2, thence through. a cavity I79 in the selector slide valve 3! to passage 58 leading to the upper end of the double check valve 39. The check valve .99 will be moved down by such pressure whereupon fluid under pressure from passage 58 will flow to passage 26 and thence to the relay valve device 'I to cause an application of the locomotive brakes. Any desired degree of independent application of locomotive brakes may thus be obtained on the locomotive as determined by the position of the brake valve handle II" or IBI in its application and release zone up to a maximum degree which will result if said handle is moved to the extremity of said zone most remote from release position. By reverse flow of fluid under pressure through the communication just described the pressure of fluid may be reduced to any selected degree in the relay valve device I in response to movement of handle IUI or I5I back toward release position to any selected position. Return of handle Ill'I or I6I to its release position will eflect a complete, release of such an application of the locomotive brakes.

When, due to either a reduction in pressure in brake pipe I or the supply of fluid under pressure to the straight air pipe 2, the brakes on the locomotive are applied, if the engineer desires to reduce the degree of such application or to efiecta complete release of the applicafluid under pressure to the"-actuating=pipe"i43 and thence 'lJQ'IllStOIl chamber-l in the seleotor'valve dev'ice" 2 l *in 'response to vvhich the selector slide --valve tlx'vill be'm'oved'to its-'--upper-'re1'ease posit'i'on. in this position 'of slide valve iil passage 8 I is 1 disconnectsd fr'om passage 23? via cav'ity W8 in--'said.' slide valve and a Cavity" i 80 in said slide valve-opens passage 8| -to atmosphere through a portl 8 l thereby venting chamber '35 in theinterlock -VaIVe' deVice 152." If the applicati'on ofbrakes' on the locori'iotive is du to" supply er fluid under pressure to the s'traightair pipe 2, t-he pressureof such' fluid in chamber: M' of the interlockvalVedeV-i'ce GI- will then operate said 'diaphrag'ni to 'close va'lve-t 9"- and open valve cation'through 'whieh fiu'id under pressure was supplied-to apply thelocomotive brakes while the-reason for opening-Walve '9 4-- willhereinafter be brought out.

'In therelease position bf the -selector slide va1ve=3l a e'avity 482 therein-connects passage '2 E from the'relay -valve tleviee1 to passage flti 1 leading to 'chamber '41 inthe -brake' release valve device 'fit. chamber 49 in -theflatten device is constantly open th'rQugIi the application and re- 'le'ase pipetz td chambei lbfi in the independent --bi ake valve device and if 'theiindependentbrake valve handle is depressed its-release position -the chamber 449 will beopen uto atmosphere throiigl'i the self lapping valve mechanism H 2 Hencew 'vith ehamber '49 -in' the' brake releaseva'lve device28 vented 'spring' li't -l'wilt holdthe' valve" 53 open and permit :releaselof fluidsunder pressure f-romthe relay valve device I :to. atmosphere. :In caseof relea''sing an. application. of? brakes 'due to fluid under:pressure' froni the' straight air pipe 2 --the el'o'sing of val ve li in -the -interlock' valve hence the cutting off ot the supply of? brake applying "flu-id Will permit a cdmple'te release :of the locomotive brakespast the' op'en' valve =53 in the release valvedevice 28. i In c'ase therappli- -cation: of brakes. were a service application due to operation of the servioe'portiorr 5 0i 'theibrake 'ecntr'olling valve device 4 'said:device will be in ia-p 'position cutting off: supplyl-ofa'fiuid under pressure to therelayFas well mom; and? a? plete :release of locomotive brakesiwill "also occur past theopenwalve 53 infitherelease: valve device-'28.

I If instead of effeeting al eompl'ete independent "release of locornot'ive brakes the engineer desires tomerely reduce the degree of-=brakeeapplication J on the locomotive, he will at the same. time as e depressing l the brak va'lvei handle 01 .or "16!, i move said handle 'into its applicationand release zone to a position eer-responding to-the degree of brake application wnreh: .he idesires' to" retain on "the locomotive. Due' o -this operation of the nrake valvehandle a corresponding pressure will -::be provided in' the application and release'pipe 2: and hence-4n d-iapl ir aTgni -"chamber 49 0f the l independent reiease'varv device zaf-Hence reh sure 0f fluidirom therelayWalve' device 1- acting in chamber- '4'! of'the release'Valve-device 28' will merely reduce past the open'* valve 53 until cation and release zone.

" If with the" brake 'valve handle 101w |6l -depressed and in 'tl'leapplication and -release 'zone the engineer moves said handle in steps back toward release position-for reducing the pressure in the application andrelease pipe 52- in 'correspond- "ing steps the independent--releasevalve device"- 28, operating in the -'same-mannen as" above-described,

"will fiect corresponding-reductions in -thedegree of brakingof the locomotive independently or the bralringjbf ca'rsin thetrain.

'A-fter the engineer -has completely or partially released the brakes -on the locomotive independently of those on cars bfa connected train, as just -desoribed'he may remove his-hand from "the brake-valve handle |U7-or 16i and'perrnitit to return to its upper position -'in--Which-t-heaetuating pipe 23* andthereby'chamber?40j in the selector valvedevice 2T- are-vented. '-"-Ihe;s elector I slide valve 3l -will then return '-to' its tnormalor 'lower position"breakingithe-ventirom diaphragm chamber in the" interlock valve-devices viathe atmosphericport ISL ,Ifthe applicationpf brakes independently released; as just described,

*wasi 'dueto fluid under pressure fromthe "straight air pipe 2 which is 'stillfcharged'witlf fluid under pressure,tlie-' diaphragm chamberfiti will remain vented. upon return of the'sele'ctorslide'valve 3? to its normal position via icaivity Hiifin said slide valve, passage 23in the independent,-application and release valve-device zfpassage" 7G in'the filler piece -I 4; past the valves 64in the magnet valve device 6 l "througnpassage 32 in 'said fi'llci' piece 5;- pastthe up enendof tl 1e; do'ul le eheol: valve 29-" and thence thro igh "passages chamber is i in the" interlock,valve'device? 32;; past the open Valvi M -and'-*to' atmosphere through passage '68. hey thus holding chainber l5 vented upon return of "the selector slide valve 3 l- ;to its normal position following an independent com- 'p'lete or partial release offlocomotivybrakesiWith the straight air 'p'ipe 2- 'still" charged-"-' with ,"fluid under pressure" for applying' th-"bralres"on "the train, "'theflo'oornotive' *bra'kes will not-automatie'ally reapplyby fluid underpressure "from said pipe.

" II" it is desired-toreapplyithelocomotive brakes "from the straight air-pipe?Fit-isnecessary for the engineertointenti'onallyipperate his automane brake valve device Kriotshowny 'to reduce the pressure in; said pipe andhence" injfchamher It of the interlock valve de'vice 62"down toa relatively rlow degree; suchas 'fiveipoun'ds; where spring will return the diaphragm "-13 to its upper position to pern'g'iitclosing of "valve'ifi l and thereby the vent-fromeha'inber"l5 and opening of valvez'st to "reestablish communication bethrough-whichan'electro pneumatic"straight air application" of?v the locomotive? brakes "may then be effeet'ecldn the same manner as" above. de-

scribed.

On the other hand, ifthe brake application released'by operation of "the" independentbrake valve device" were due topperationiof the-brake controlling valve device 4""irr'response. to a 'reduction in pressure in 'brakefpipei I; "then. it -is also necessary 'forthe "erigineertofoperate his automatic brake valve device (notjshown) .to cause reapplication' of'the locomotive brakes from the brake'pipe I if such is desired.

In other words'if. the brakes fonfthe locomotive "are releasedbydepressing"theindependent brake automatically occur upon relief of manual pressure on said handle.

The valve 153 in the independent brake valve devic is closed except in the extreme position of handle 101 or I61 from its release position in its application and release zone in order that pressure may be obtained in the actuating pipe d3 for operating the selector slide valve 31 to its release position to permit independent release of locomotive brakes, as above described, to any desired degree less than a maximum independent application. The valve I53 is open in the extreme position, above mentioned, of handle I01 or I61 to insure in case of leakage of fluid under pressure past valve I29 (Fig. 2) or valve I66 (Fig. '1 into the actuating pipe 43, that the selector slide valve 31 will be in its normal position when a maximum independent application of locomotive brakes is desired in order to ensure that fluid supplied to the application and release pipe 52 will promptly become eflective through cavity I19 in said slide valve, passage 58 and past the double check valve 30 in the relay valve device 1 for applying the locomotive brakes.

The independent brake valve handle I61 or I6I will remain depressed only when subject to manual pressure and thus insures that the selector valve 31 will be in its normal, lower position except when intentionally operated to efiect an independent release of locomotive brakes on the locomotive. With the slide valve 31 in its lower position passage 26 from th relay valve device is disconnected from the independent release valve device 28 which insures that in case of an emergency reduction in pressure in brake pipe 2, the fluid under pressure supplied by consequent operation of the brake controlling valve device 4 to passage 26 will become effective in the relay valve device 1 to cause an emergency application of the fluid pressure brakes on the locomotive.

so far in the description it has been assumed that the dynamic brakes'on the locomotive were ineflective and as a consequence the dynamic brake magnet 63 was deenergized and the valves 6,5 in their upper position as shown in the draw- Now assume that the dynamic brakes are cut into operation. The magnet 63 will as a result become energized and seat the valves 64 in their lower position. With the valves 64 in their lower position communication is closed between passages 15 and 12 so that if the fluid pressure brakes on the locomotive are released at the time the dynamic brakes are cut in, the fluid pressure brakes on the locomotive can not be applied as long as the dynamic brakes are in action.

However, assume that the fluid pressure brakes are applied at the time the dynamic brakes are cut into action. Under this condition the opening of chamber 65 to chamber 61 upon seating of the valves 64 in their lower position will release fluid under pressure from the relay valve device 1 via passages 25, I6 and 26, past the lower end of the double check valve 30, thence through passages 23 and 10, chamber 65, chamber '61 and passage 68 to atmosphere whereby the fluid pressure brakes on the locomotive will be released.

When the dynamic brakes on the locomotive are cut out of action it is not desired that the fluid pressure brakes automatically reapply. To prevent this in case the straight air pipe 2 is charged with fluid under pressure diaphragm chamber 15 in the interlock valve device 62 is vented upon energization of the dynamic brake magnet 63- via passages 80, 8|, cavity I18 in the selector slide valve 31, passage 23 and past the magnet valves 62, so that the parts of the selector valve device 62 will be moved to their lower position by straight air pipe pressure in chamber 14 while the dynamic brakes are eflective. When the dynamic brakes are cut out and the magnet 63 is consequently deenergized chamber 15 in the interlock valve device 52 will be held vented past the open valve therein and through passage 61, thereby maintaining closed the communication through which a straight air application of the fluid pressure brakes on the locomotive occurs so that such an application can not automatically take place upon the dynamic brakes becoming ineffective. In order to apply the locomotive brakes from the straight air pipe 2 after the dynamic brakes are cut out it is therefore necessary to reduce the pressure in the straight air pipe 2 down to a low degree to reset the interlock valve device 62 as before explained, following which such an application may be efiected by intentional operation of the operators automatic brake valve device.

If an automatic application of fluid pressure brakes on the locomotive is in effect at the time the dynamic brakes are cut into operation and the magnet 53 is energized or if while the dynamic brakes are in action the brake controlling valve device 6 operates in response to a reduction in pressure in brake pipe I to supply fluid under pressure to passage l5 and past the lower end of the'double check valve 29 to passage 12 which is closed off from passage 10 by the magnet valves 52 in their lower position, such fluid will be vented to atmosphere through choke II to passage 18 and thence past the upperunseated valve 64 and passage 68 whereby when the dynamic brake is cut out of action and the valves 64 move to their upper position there Will be no fluid pressure in passage 12 to automatically cause an application of the locomotive brakes. To effect an automatic application of brakes under this condition the engineers automatic brake valve device must be operated to reduce the pressure in the brake pipe and cause operation of the brake controlling valve device 4 to again supply fluid under pressure to passage 12.

While the dynamic brakes on the locomotive are in action however, an application of the fluid pressure brakes on the locomotive by operation of the independent brake valve device may be efiected at any time, it being noted that when fluid under pressure is supplied to theapplication and release pipe 52 by operation of said brake valve device such fluid will flow through cavity I19 in the selector slide valve 31 to passage 58 leading to the upper end of the double check valve 33. The check valve 30 will be shifted to its lower position to disconnect passage 26 from passage 23, which latter passage is vented through passage 15 and past the magnet valves 64, whereby the fluid under pressure from passage 58 may become effective through passage 26 in the relay valve device 1 to apply the locomotive brakes. By reverse flow such fluid may be released from the relay valve device 1 to effect a release of the locomotive fluid pressure brakes upon suitable operation of the independent brake valve device, as will be apparent.

Whenever an emergency reduction in pressure in brake pipe I is efiected the dynamic brakes, if effective, are adapted to be cut out of operation (by means not shown in the drawing) and the magnet 63 consequently deenergized whereby an valve device 2.

emergency application of the fluid ,jpressure whichit isshov/n in the drawing closes communication between passages 86 and 153 so that chamber l in'the interlock valve device 62 will :be vented upon movement of the selector slide valve 3'5 toitsupper release position, in effecting an independent release of an electro-pneumatic straight air applicationoi brakes, for causing operation of the selector valve device 62 to close communication between passages "59 and as so :that the locomotive brakes will not reapply by fiuidiunder pressure from the straight air pipe '2 upon removal of manual pressure on thebrake valve handle it? or lti with consequentreturn of the selector slide valve 37 to its lower or normal position, as hereinbeiore described. Thisieature 'maynot bedesired on certain locomotives-and if such-bathe case,the,plugii2 may be removed from ithe'l'ocationin which it is shown in the drawing and placed the screw-threaded opening 83. With the :plug 52 vinopening 83 communication is closedbetween chamber 75 in the interlock valve device 22 and the selector slide valve 3'? which eliminates the feature just mentioned,

:howevenxchamber 75 in the interlock valve device :52 is now open directly to passage it} and Will operate during dynamic braking and upon "termination thereof as hereinbefore described.

As before mentioned, the brake equipment shown in Fig. 1 of the drawing is particularly adapted for-use on locomotives of the diesel type in which the propulsion motors are adapted to act as generators to provide dynamic braking andwhich must haul trains on which 'the brakes are adapted to becontrolled on either the automatic principle through'the medium of a brake .pipe I or on the electro-pneumatic straight air principle through themedium of astraight air pipe 2. The same brake equipment may be used onall locomotives hut ii a locomotive isnot equipped for dynamic braking there is no need for the dynamic interloohrnagnet valve device'fi or if the locomotive is not for use in hauling trainsvvith a straight air pipe and not equipped for dynamic braking there is .no need'for either the. magnet valve device i or interlock valve device 62, while if the locomotive is equipped for dynamic braking but is not to used for hauling trains-with a straight air pipe .2 and it is not desired to havethe feature provided 'by the interlock valve device '52 in connection with .dynamic braking there is no need for the interlock Accordingly only those parts necessary'to providethe features desired for any particular locomotive need be provided for diiierent locomotives.

For example if a locomotive is not equipped for dynamic bra" the dynamic bralzeinterlock magnet valve device 5i may be om'ted and in its place a cover iii-3 (Fig. 6) applied, said cover having a cavity I for connectingpassages iii, 12in the fillerpiece whereby, except fordynainic braking, the pment will operate'in the same 'manneras above described.

Iii the feature provided bytheinterloclz valve device @2 is notdesired-said device be omitted except for the omissicnof said feature the vec ui merit will-operate the sameas above descr When the in erlock valve device e2 is omit-ted from the or inent themounting face on the filler piece it will be covered by a coveritii (Hi 5 l'nzcase a locomotive is .notequipped for dy- F18 namic braking and is not to be used for controlling brakes'through a straight air'pipe 2 the whole filler piece it maybe omittedand-except for the features thus removed, the equipment will operate the same as above described.

By the addition or removal of parts just described the braheequipmentmay be adapted to any locomotive and the'particular typeof service in which it is to be employed.

SUMMARY it will now-be seen that we have provided What may becalleda-universal locomotive-brake equip ment in that by the addition or omission of parts it :maybe-adapted to anytype of present day locomotive accordingto the class of service in which .it is adapted to be \used and according to the class of service the equipment embodies such interlocksas to avoid interference-of one brake system withanother yet insuring at --all times the safety of the locomotive andconnected cars of a train.

Having now described our invention what we claim as 'new anddesire to secure. by Letters. Pat- .ent, is:

In. a fluid pressure:brakeapparatus, .in combination, brakaapplyingmeans operable by fluid under, pressure .to -ehect an applicationof brakes, -means for conveying fluid underpressure to 10perate said brake applying means, .a controlpipe, brake release means controlled by opposingrpressuresof fluidinafirst chamber constantly open to said pipe and 'ina second chamber and operative bypressureof fluid in said second chamber to reduce the ressure therein :to substantial equalization with-that in said firstchambenaan .engineers self-lapping brake valve device comprising -.a handle which .ismanually depressible 4 and which isalso movable --horizontally. in an ap- :plicationrand release zonerand which is operable by said handle in .said zone to provide fluid in .said pipe .corresponding-tothe position of said handle .in saidzone, selector. means controlling a communication between said brake applying means and 1 said second chamber .and means responsive .to depression 01 said handle to eiiect rcperationof said selectormeans to open-said con munication and :operable upon relief of pressure on said handle to .efiectoperation of i said seiec- .tor .means to 1 close saidcommunication.

.2. In. a .fluidpressure brake apparatus, -in-..combination, brake applying operable by fluid .undenpressure toeffect an: application of brakes, means for conveying fluid uinder pressure to operate said ebrake applying. means, a control pipe, brake release meanscontrolled by opposingpressures vof .fiuid inafirst chamber constantly :open

tosaid:pipe.and in-asecond chamber-and operative by pressure of fluid in .said second chamber to reduce .the pressure therein to substantial equalization with that in said first chamber, an engineers self-lapping brake valve device rcomprising a handle which .is .manually .depressible and whichisalso movable horizontally in an :application .and release .zone and which is operable bysaidhandlein said zone .to provide .iiuid .in saidpipeata pressure corresponding to theposition of .said handle insaidzone, .anothercontrol pipe, selector valve means operable .in response tosupplyni fluid under pressure .to said other control pipe to establish communication betweensaid brakeapplyingmeans and saidsec- .ond chamber and lupon releaseof fluid under pressure frcmesaid. other. control pipe to close-said communication, and means operable by depressicn of said handle to supply fluid under pressure to said other control pipe and upon relief of manual pressure on said handle to vent said other control pipe.

8. In a fluid pressure brake apparatus, in combination, brake applying means operable by fluid under pressure to effect an application of brakes and upon release of fluid under pressure a release of brakes, a passageway to which fluid under pressure is adapted to be supplied and from which fluid under pressure is adapted to be released a communication for conveying fluid under pressure between said passageway and said brake applying means, release means for releasing fluid under pressure from said brake applying means, interlock valve means for closing said communication off from said passageway, selector means for eflfecting such operation of said release means and interlock valve means, means for operating said interlock valve means to open said communication to said passageway upon release of fluid under pressure from said passageway, and means for controlling said selector means.

4. In a fluid pressure brake apparatus, in combination, brake applying means operable by fluid under pressure to eiTect an ap lication of brakes, means for conveying fluid under pressure to said brake applying means, movable abutment means subject to opposing pressures of fluid in two chambers, valve means operable by said abutment means upon a preponderance in pressure of fluid in one of said chambers to reduce such pressure to substantially that in the other chamber, valve means for closing comm nication through said conveying means to said brake applying means, selector means for opening communication between said one chamber and said brake applying means and for at the same time eflecting said operation of said valve means, and an en ineers brake valve device for eflecting operation of said selector means and at the same time either opening said other chamber to atmosphere or supplying fluid thereto at any selected pressure.

5. In a fluid pressure brake apparatus, in combination, brake applying means operable by fluid under pressure to effect an application of brakes, means for conveying fluid under pressure to said brake applying means, release means for releasing fluid under pressure from said brake applying means, an engineers brake valve device operative to effect operation of said release means, valve means for selectively opening and closing communication through said conveying means, and means responsive to said operation of said brake valve device to effect operation of said valve means to close communication through said conveying means and operative to open said communication in response to release of fluid under pressure from said conveying means on the side of said valve means opposite said brake applying means.

6. In a fluid pressure brake apparatus, in combination, brake applying means operable by fluid under pressure to efiect an application of brakes, a passageway to and from which fluid under pressure is adapted to be supplied and released, respectively, interlock means comprising movable abutment means subject opposingly to pressure of fluid in a first chamber, open to said passageway, and pressure of fluid in a second chamber and operative upon substantial equalization of pressures in said chambers to open communication between said passageway and brake applying means upon venting of fluid under pressure from said second chamber with fluid under pressure present in said first chamber to close said communication, first and second control pipes, other movable abutment means subject opposingly to pressures of fluid in said first pipe and in a third chamber, release valve means operable by said other movable abutment means to reduce pressure of fluid in said third chamber to substantial equalization with pressure of fluid in said first pipe, selector means operable upon supply of fluid under pressure to said second pipe to open said brake applying means to said third chamber and to vent said second chamber and upon release of fluid under pressure from said second pipe to disconnect said brake applying means from said third chamber and to open said second chamber to said brake applying means, and an engineers brake valve device for selectively supplying fluid under pressure to and releasing fluid under pressure from said second pipe and at the same time providing any desired pressure of fluid in said first pipe.

'7. In a fluid pressure brake apparatus, in combination, brake applying means operable by fluid under pressure to effect an application of brakes, means for conveying fluid under pressure to said brake applying means, interlock valve means controlling communication through said conveying means comprising movable abutment means subject opposingly to fluid pressures in first and second chambers and operative upon substantial equalization of said opposing pressures to open said communication and upon release of fluid under pressure from said first chamber with pressure of fluid acting in said second chamber to close said communication and vent the portion of said communication connected to said brake applying means, means for opening said second chamber to said communication ahead of said interlock valve means including choke means for restricting flow of fluid under pressure to said second chamber and a communication by-passing and of greater capacity than said choke means for releasing fluid under pressure from said second chamber, a check valve in the last named communication for preventing flow of fluid under pressure therethrough to said second chamber, release means for releasing fluid under pressure from said brake applying means, selector means having one position for rendering said release means effective to vent fluid under pressure from said brake applying means and for venting said first chamber and having another position for rendering said release means non-operative to release fluid under pressure from said brake applying means and for opening said first chamber to said brake applying means, and an operators control device for controlling the positioning of said selector means.

8. In a fluid pressure brake apparatus, in combination, brake applying means operable by fluid under pressure to eflect an application of brakes andupon release of fluid under pressure to effect a release of brakes, a passageway adapted to be supplied with fluid under pressure and from which fluid under pressure is adapted to be released a communication for conveying fluid under pressure between said passageway and said break applying means, release means for releasing fluid under pressure from said brake applying means, interlock valve means for closing said communication ofi from said passageway, selector means for effecting such operation of said release means and interlock valve means, dynamic brake means for releasing fluid under pressure from said brake applying means and at the same time effecting said operationof said interlock valve means, means foroperating said interlock valve means toopen said communica-. tion to said passageway upon release of fluid under pressure from said passageway, and means for controlling said selector means.

9. In a fluid pressu "e brake apparatus, in combination, brake applying means operableby fluid under pressure to effect an application of brakes, a passageway to which fluid under pressure is adapted to be supplied and from which fluid under pressure is adapted to be released, means for establishing communication between saidpassageway and said brake applying means including interlock valve means controlling said communication and movable abutment means subject-opposingly to pressures of fluid in a first chamber, open to passageway, and in a second chamher and operative upon tubstantial equalization, of pressures in said chambers to open said communication adapted to be operated by pressure of fluid in said first chamber upon venting said second chamber to close said communication,

brake release rneans controlled by opposing pressures of fluid in, respectively, third and fourth chambers and operable by pressure of fluid in said third chamber to reduce such pressure to substantially that in said fourth chamber, a. first control pipe open to said fourth chamber, second con trol pipe, selector means movable to one position in response to venting of said second pipe for opening said second chamber to the portion of said communication at the brake applying means side of said interlock valve meansand for disconnecting said third chamber from said brake applying means and movable to another position upon supply or" pressure to said second pipe for venting said second chamber and for opening said third chamber to said brake applying means, said interlock valve means operating to vent said portion of said communication upon venting of iluid under from said second chamber with fluid under pressure present in said first chamber, a dynamic brake magnet device ior selectively opening said communication between interlock means and brake applying means and for closing such communication and venting th' to applying means side thereof, and an en lneers brake valve device for selectively sup r plying and releasing; fluid under pressure to and from said second pipe and at the same time to and from said first pipe.

10. In a fluid pressure brake apparatus. in combination, brake applying means operable by fluid re to efiect an application of brakes, means for conveying fluid under pressure to said brake applying means, interlock inea-ns controlling corn iunication through said conveying means compr sing movable abutment means controlled by opposing fluid pressures'in two chambers operative upon substantial equalization of such pressures to open communication and upon release of iluid under pressure from one of chambers with uid under pressure pres.- ent in the second chamber to close said communication and open to atmosphere the pertionof said communication at the brake applying means side of said interlock means, dynamic brake re sponsive means arranged to control said commu nication between said interlock means and-brake applying means and selectively operative to either open the communication or to close the communication and open said brake applying means to atmosphere, brake release means-for venting fluid:

under pressure; fromxsaidhrake applying means, selectormeans-having one. position for effecting operation ofsaid brakerelease means and for venting. said onev chamber and another position for rendering said: brakerelease means ineffective and upon release of-fiuid under pressurefrom one or said chambers-with fluid-under pressure present in the-second chamber to close said communication'and open to atmosphere the portion of said communication at the brake applying means side of saidinterlock means, dynamic brake responsivemeans arranged to control said communication between said interlock means and brake applying meansandselectively operative to either open the communication or to close the communication and open said brake applying means to atmosphere, brake release means for venting fluid under pressure from said brake applying means, selector'mea-ns having one position for eiiecting operation of said brake release means and another position for renderingsaid brake-release means ineirective, a first passageway for opening said one chamb'er'to saidbrake applying means, another passageway for opening. said one chamber to said'selector means, a plug selectively positionable in either one of said passageways for closing communication therethrough, said selector means insaid oneposition opening saidv passageway to atmosphere and'inits other position opening said first passageway to said brake applying means, and anoperators control device for p0sitioning said selector means.

12. In a fluid pressure. brake equipment in which brakes are adaptedto be controlled from either a brake pipe or a straight air pipe, the combination of brake applying means operable by fiuid under pressure to effect an application of brakes, a brake controlling valve device coinprising apipe bracket, valve, means carried by said bracket operative upon a reduction in brake pip-epressure to supply fluid under pressure for operating said brake applying means, a straight air pipe passage in said bracket adapted for. con necti'on with. said straight air pipe for conveying fluid under pressure to operate said brake applying means, an independent application and release, valve device removably carried by said bracket comprising a double, check valve controlling communication between said valve means and straight air pipe passage which are connected; respectively, to opposite ends. or said double check valve, and said brake 1 applying means connected to the side outlet of said double checkvalve; and a release valve device comprisling movable abutment means-subject opposingly to pressures of fluid-in first and second chambers and valvev means operable by said abutment means upon apreponderance in pressure in said firstxchamberto reduce such pressure to substarn tiaLequa-lizationawith that in said secondchamber,,an1. application: and release pipe connected to said bracket, an actuating pipe connected to said bracket, first and second passageways in said bracket for connecting said application and release pipe and said actuating pipe, respectively, to said independent application and release valve device, said independent application and release valve device further comprising a passageway opening said first passageway tov said second chamber, and selector means operable upon supply of fluid under pressure to a third chamber to open said first chamber to said brake applying means and upon venting said third chamber to close communication between said first chamber and said brake applying means, and a passageway connecting said third chamber to said second passageway in said bracket which is open to said actuating pipe.

13. In a fluid pressure brake equipment in which brakes are adapted to be controlled from either a brake pipe or a straight air pipe, the combination of brake applying means operable by fluid under pressure to effect an application of brakes, a brake controlling valve device comprising a pipe bracket, valve means carried by said bracket operative upon a reduction in brake pipe pressure to supply fluid under pressure for operating said brake applying means, a straight air pipe passage in said bracket adapted for connection with said straight air pipe for conveying fluid under pressure to operate said brakeapplying means, an independent application and release valve device, a filler piece removably carried by said bracket and carrying said independent application and release valve device, a double check valve in said independent application and release valve device adapted to be subjected on opposite ends to pressureof fluid provided by said valve means and from said straight air pipe passage, respectively, for selectively establishing communication for the flow of such fluid pressure to a side outlet of said double check valve and thenceto said brake applying means, interlock means removably carried by said filler piece controlling communication between said straight air pipe bracket passage and the respective end of said double check valve and operative to open such communication upon substantial equalization of opposing fluid pressures in first and second chambers and to close such communication upon venting of fluid under pressure from said second chamber when fluid under pressure is present in said first chamber, means opening said first chamber to said straight air pipe passage, said independent application and release valve device further comprising release means controlled by opposing pressures of fluid in third and fourth chambers and operative to reduce pressure of fluid in said third chamber to substantial equalization with pressure of fluid in said fourth chamber, a selector valve device movable to one position upon release of fluid under pressure from a fifth chamber for opening said second chamber to said brake applying means and closing communication between said brake applying means and said third chamber and movable to another position upon supply of fluid under pressure to said fifth chamber to open said third chamber to said brake applying means and said second chamber to atmosphere, an application and release pipe and an actuating pipe connected to said bracket, and means opening said application and release pipe and said actuating pipe through said bracket and filler piece to, respectively, said fourth chamber in said release means and to said fifth chamber in said selector valve device.

24 14. In a fluid pressure brake equipment in which brakes are adapted to be controlled from either a brake pipe or a straight air pipe, the combination of brake applying means operable by fluid under pressure to effect an application of brakes, a brake controlling valve device comprising a pipe bracket, valve means carried by said bracket operative upon a reduction in brake pipe pressure to supply fluid under pressure for operating said brake applying means, a straight air pipe passage in said bracket adapted for connection with said straight air pipe for conveying fluid under pressure to operate said brake applying means, an independent application and release Valve device, a filler piece removably carried by said bracket and carrying said independent application and release valve device, a double check valve in said independent application and release device adapted to be subjected on opposite ends to pressure of fluid provided by said valve means and from said straight air pipe passage, respectively, for selectively establishing communication for the flow of such fluid pressure to a side outlet of said double check valve, a dynamic brake controlled device removably carried by said filler piece for selectively opening communication between said side outlet of said double check valve and said brake applying means or for closing such communication and opening said brake applying means to atmosphere, said independent appplication and release valve device comprising release valve means controlled by opposing pressure in two chambers and operative by pressure or" fluid in a first of said chambers to reduce the pressure therein to substantial equalization with pressure of fluid in the second chamber, and selector means operative upon venting of fluid under pressure from a third chamber to close communication between said first chamber and said brake applying means and upon supply of fluid under pressure to said third chamber to open the last named communication, an application and release pipe and an actuating pipe connected to said bracket, and means opening said application and release pipe and said actuating pipe through said bracket and filler piece to, respectively, said second and third chambers.

15. In a fluid pressure brake equipment in which brakes are adapted to be controlled from either a brake pipe or a straight air pipe, the combination of brake applying means operable by fluid under pressure to effect an application of brakes, a brake controlling valve device comprising a pipe bracket, valve means carried by said bracket operative upon a reduction in brak pipe pressure to supply fluid under pressure for operating said brake applying means, a straight air pipe passage in said bracket adapted for connection with said straight air pipe for conveying fluid under pressure to operate said brake applying means, an independent application and release valve device, a filler piece removably carried by said bracket and carrying said independent application and release valve device, a double check valve in said independent applicatio and release valve device adapted to be subjected on opposite ends to pressure of fluid provided by said valve means and from said straight air pipe passage, respectively, for selectively establishing communication for the flow of such fluid pressure to a side outlet of said doubl check valve, interlock means removably carried by said filler piece controlling communication between said straight air pipe bracket passage and the respective end of said double check valve and operative to open said communication upon substantial equalization of opposing fluid pressures in first and second chambers and to close said communication and vent the connection to the respective end of said double check valve upon venting of fluid under pressure from said second chamber when fluid under pressure is present in said first chamber, means opening said first chamber to said straight air pipe passage, said independent applicatio and release valve device further comprising release means controlled by opposing pressures of fluid in third and fourth chambers and operative to reduce pressure of fluid in said third chamber to substantial equalization with pressure of fluid in said fourth chamber, and a selector valve device movable to one position upon release of fluid under pressure from a fifth chamber for opening said second chamber to said brake applying means and closing communication between said brake applying means and said third chamber and movable to another position upon supply of fluid under pressure to said fifth chamber to open said third chamber to said brake applying means and said second chamber to atmosphere, a dynamic brak controlled device removably carried by said filler piece for selectively opening communication between said side outlet of said double check valve and said brake applying means or for closing such communication and opening said brake applying means to atmosphere, an application and release pipe and an actuating pipe connected to said bracket, and means opening said application and release pipe and said actuating pipe through said bracket and application and release zone and also manually depressible, self-lapping valve means adjustable by said handle to open said application and release pipe to atmosphere in said release position and to provide fluid in said application and release pipe upon positioning of said handle in said zone at a pressure proportional to the distance of said handle from said release position, other valve means operabl by manual depression of said handle to supply fluid under pres-' sure to said actuating pipe and operative upon relief of manual pressure on said handle to vent said actuating pipe, and a third valve means 0perable by horizontal movement of said handle to its extreme position in said zone away from said release position to also vent said actuating pipe.

ERIK G. ERSON. GLENN M. THOMAS.

References Cited in the file of this patent UNITED STATES PATENTS Name Date Linhart July 20, 1948 Gorman Mar. 22, 1949 Number 

